(n.) The system of arranging the scale by the names do, re, mi, fa, sol, la, si, by which singing is taught; a singing exercise upon these syllables.

bravura choral singing coloratura croon crooning folk singing hum humming intonation lyricism operatic singing scat scat singing singing sol-fa sol-fa exercise solfeggio solmization song tonic sol-fa vocal music vocalization warbling yodel yodeling